689062501 has 4 divisors (see below), whose sum is σ = 695885004. Its totient is φ = 682240000.

The previous prime is 689062483. The next prime is 689062571. The reversal of 689062501 is 105260986.

It is a Cunningham number, because it is equal to 26250²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 105260986 = 2 ⋅52630493.

It can be written as a sum of positive squares in 2 ways, for example, as 662032900 + 27029601 = 25730^2 + 5199^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689062501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689062571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3411100 + ... + 3411301.

It is an arithmetic number, because the mean of its divisors is an integer number (173971251).

Almost surely, 2^689062501 is an apocalyptic number.

It is an amenable number.

689062501 is a deficient number, since it is larger than the sum of its proper divisors (6822503).

689062501 is a wasteful number, since it uses less digits than its factorization.

689062501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6822502.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 689062501 is about 26250.0000190476. Note that the first 4 decimals coincide. The cubic root of 689062501 is about 883.2552049408.

The spelling of 689062501 in words is "six hundred eighty-nine million, sixty-two thousand, five hundred one".